Trig identities Flashcards by Joe Bambrough | Brainscape

Q

tan 2x

A

2tan x/ (1 - tan^2x)

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Q

tan ^2 x

A

1 + sec^2 x

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Q

tan (x+y)

A

(tan x + tan y) / (1 - tanxtany)

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Q

tan (x-y)

A

(tan x - tan y) / (1 + tanxtany)

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